Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A406 Safari/7534.48.3) I have the 4S and it's jail broken. I recently had my handset replaced & before I had loads of different Tweeks on it...battery wasn't great. So now, all I have put on Is killbackground - that's such a good tweek apple should put that in. I haven't actually put anything else on yet..apart from a few safety packages etc. So does the jailbrake alone drain the battery faster? Do mods & Tweeks cause battery drain? Or..no, 'it doesn't make a difference & you think it's draining faster because your constantly on your iPhone modding and tweeking'